Year	Percent
1950	18.99366
1955	18.86686
1960	18.57571
1965	18.27329
1970	17.21208
1975	15.83768
1980	14.08505
1985	12.91001
1990	12.28544
1995	11.16833
2000	10.11798
2005	8.8474
2010	8.46393
2015	7.75528
2020	7.1938
2025	6.63077
2030	6.15794
2035	5.78836
2040	5.51441
2045	5.28693
2050	5.06754
2055	4.86743
2060	4.68292
2065	4.54905
2070	4.45262
2075	4.38721
2080	4.32532
2085	4.25873
2090	4.20491
2095	4.17124
2100	4.15815